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  • dba_firstkey()

    (PHP 4, PHP 5, PHP 7)

    Fetch first key

    说明

    dba_firstkey(resource $handle): string

    dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.

    参数

    $handle

    The database handler, returned by dba_open() or dba_popen().

    返回值

    Returns the key on success 或者在失败时返回FALSE.

    参见

    Looks like Jacky is using some DB object? I don't know if it's native to PHP or written on it's own... Anyways this is what I use:
    $DBCon = dba_open("/tmp/test_db.db2", "r", "db2") or die("Uh oh, can't open the database :(");
    if ($the_key = dba_firstkey($DBCon)) do {
      print("Key: $the_key  Value:");
      print dba_fetch($the_key, $DBCon);
      print("<BR>");
    } while ($the_key = dba_nextkey($DBCon));
    print ("<BR><BR><BR>Well looks like we're done here :-)");
    for ($key = dba_firstkey($this->handle); $key !== false; $key = dba_nextkey($this->handle)) {
          $keyset[] = $key;
        } // end for
    I wondered why it wasn't already written, so I did because I think working with associative arrays is always as comfortable as can be
    <?php
    function dba_fetch_assoc($handle) {
      $assoc = array();
      for($k = dba_firstkey($handle); $k != false; $k = dba_nextkey($handle)) {
        $assoc[$k] = dba_fetch($k, $handle);
      }
      return $assoc;
    }
    ?>
    

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